/Engine/Plugins/Experimental/ScriptableToolsFramework/Source/ScriptableToolsFramework/Public/ScriptableInteractiveTool.h
Clear any active message shown via DisplayUserHelpMessage and/or DisplayUserWarningMessage
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="ScriptableTool|Messaging") void ClearUserMessages ( bool bHelpMessage, bool bWarningMessage )